Check valve for flue

Abstract

The check valve comprises a connecting pipe fitting, a groove is formed in the periphery of the top of the connecting pipe fitting, a cross-shaped sliding groove is formed in the inner bottom of the groove, a cross-shaped sliding block is connected into the cross-shaped sliding groove in a sliding mode, and a fixing plate is fixedly connected to the top of the cross-shaped sliding block. A clamping plate is fixed to the inner side of the fixing plate through a supporting column. A check valve body is arranged at the top of the connecting pipe fitting, a fixing ring is fixedly connected to the periphery of the bottom of the check valve body, the clamping plate is clamped into the fixing ring, and the shape of the clamping plate is matched with that of an inner cavity of the fixing ring. The connecting pipe fitting, the groove, the cross-shaped sliding groove, the cross-shaped sliding block, the fixing plate, the clamping plate, the pull rod, the check valve body, the fixing ring, the valve clack and other parts are arranged and used in cooperation, so that the check valve body is conveniently detached from the connecting pipe fitting, the detaching efficiency of the check valve body is improved, and in addition, the connecting pipe fitting is convenient to detach. And the mounting stability of the check valve body is also improved conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of flues, in particular to a check valve used for flues. Background Art

[0002] A flue is a tubular device for exhausting exhaust gases and smoke. A residential flue, also known as an exhaust duct, ventilation duct, or residential exhaust duct, refers to a vertical pipe used to remove kitchen or bathroom fumes. Flue exhaust requires a check valve to prevent reverse flow or backflow of smoke, ensuring it is discharged smoothly and in the correct direction. Flue check valves are typically installed at the outlet of a chimney or flue system. By blocking reverse flow of smoke, they prevent dust, smoke, or harmful gases in the flue from flowing back into the furnace or equipment, thereby protecting the safe operation of the equipment.

[0003] When the existing check valve is installed on the pipeline, it is usually fixed directly by screws, which makes it inconvenient to quickly disassemble the check valve for maintenance and replacement, thereby reducing the efficiency of disassembly and replacement. Utility Model Content

[0004] The purpose of the present utility model is to provide a check valve for a flue, which is convenient for disassembling the check valve body from the connecting pipe fitting by arranging connecting pipe fittings, grooves, cross-shaped slide grooves, cross-shaped sliders, fixed plates, clamping plates, pull rods, check valve bodies, fixed rings and valve flaps for use in combination, so as to improve the efficiency of disassembling the check valve body and also facilitate improving the stability of the check valve body during installation; so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A check valve for a flue comprises a connecting pipe fitting, wherein the top of the connecting pipe fitting is provided with grooves around the periphery, the inner bottom of the groove is provided with a cross-shaped slide, the interior of the cross-shaped slide is slidably connected to a cross-shaped slider, the top of the cross-shaped slider is fixedly connected to a fixing plate, and a clamping plate is fixed to the inner side of the fixing plate via a support.

[0007] A check valve body is provided on the top of the connecting pipe fitting, and a fixing ring is fixedly connected to the bottom of the check valve body. The clamping plate is clamped into the inside of the fixing ring, and the shape of the clamping plate is adapted to the inner cavity of the fixing ring. A valve disc is movably connected to the top center of the check valve body.

[0008] Preferably, two ends of the center of the bottom of the connecting pipe are provided with bayonet holes for clamping the flue, and the bayonet holes are located on the side walls of the inner cavity of the connecting pipe.

[0009] Preferably, a pull rod for handholding is fixedly mounted on the outer side of the fixing plate.

[0010] Preferably, groove rings for handholding are provided below both sides of the check valve body.

[0011] Preferably, two ends of the inner side of the groove ring are fixedly connected with clamping blocks, and the clamping blocks are clamped in the clamping grooves provided on the check valve body.

[0012] Preferably, the card block and the card slot are adapted to each other.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model provides connecting pipe fittings, grooves, cross-shaped slide grooves, cross-shaped sliders, fixed plates, clamping plates, pull rods, check valve bodies, fixed rings and valve discs for use in conjunction with each other, thereby facilitating the disassembly of the check valve body from the connecting pipe fittings, thereby improving the efficiency of disassembly of the check valve body, and also facilitating improving the stability of the check valve body during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 3 This is a schematic diagram of the explosive separation structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the separation structure of the check valve and the groove ring of the utility model.

[0019] In the figure: 1. Connecting pipe fitting; 101. Bayonet; 2. Groove; 3. Cross-shaped slide; 301. Cross-shaped slider; 302. Fixed plate; 303. Clamping plate; 304. Pull rod; 4. Check valve body; 401. Fixed ring; 402. Valve disc; 5. Clamping groove; 501. Clamping block; 502. Groove ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figures 1 to 4 , the utility model provides a technical solution:

[0022] A check valve for a flue comprises a connecting pipe fitting 1, the top of which is provided with grooves 2, the inner bottom of which is provided with a cross-shaped slide groove 3, the interior of which is slidably connected to a cross-shaped slider 301, the top of which is fixedly connected to a fixing plate 302, the inner side of which is fixed with a clamping plate 303 via a support, and the outer side of which is fixedly installed with a pull rod 304 for holding by hand.

[0023] A check valve body 4 is provided at the top of the connecting pipe fitting 1, and a fixing ring 401 is fixedly connected to the bottom of the check valve body 4. The clamping plate 303 is clamped inside the fixing ring 401, and the shape of the clamping plate 303 is adapted to the inner cavity of the fixing ring 401. A valve flap 402 is movably connected to the top center of the check valve body 4.

[0024] The utility model is provided with a connecting pipe fitting 1, a groove 2, a cross-shaped slide groove 3, a cross-shaped slider 301, a fixed plate 302, a clamping plate 303, a pull rod 304, a check valve body 4, a fixing ring 401 and a valve disc 402 and other components for use together, thereby facilitating the disassembly of the check valve body 4 from the connecting pipe fitting 1, so as to improve the efficiency of disassembly of the check valve body 4, and also facilitate improving the stability of the check valve body 4 during installation.

[0025] Furthermore, when the check valve body 4 needs to be quickly disassembled for inspection and replacement, the pull rod 304 is held by hand to drive the fixing plate 302 to move outward, so that the cross-shaped slider 301 set on the bottom of the fixing plate 302 can slide out from the cross-shaped slide groove 3. At the same time, the clamping plate 303 is also moved out from the fixing ring 401 on the bottom of the check valve body 4, thereby facilitating the disassembly of the check valve body 4 from the connecting pipe 1 for inspection and replacement, and the reverse operation can be performed to install it.

[0026] The working principle of the check valve body 4 is as follows: when there is normal exhaust gas flow in the flue, the pressure generated by the flow will push the valve flap 402 of the check valve body 4 to open, allowing the gas to be discharged to the outside through the flue smoothly.

[0027] When external airflow attempts to enter the flue, the valve flap 402 will quickly close under the action of spring force, its own gravity or airflow pressure difference, preventing external air from flowing back into the room.

[0028] At both ends of the center of the bottom of the connecting pipe 1 , there are provided bayonet holes 101 for clamping the flue, and the bayonet holes 101 are located on the side walls of the inner cavity of the connecting pipe 1 .

[0029] Groove rings 502 for holding by hand are provided below both sides of the check valve body 4. The inner ends of the groove rings 502 are fixedly connected with clamping blocks 501, and the clamping blocks 501 are clamped in the clamping grooves 5 opened on the check valve body 4. The clamping blocks 501 are adapted to the clamping grooves 5.

[0030] Furthermore, the present invention facilitates the lifting of the check valve body 4 from the connecting pipe 1 by setting the above-mentioned groove ring 502, block 501 and groove 5 and other components for use, so as to facilitate the removal of the check valve body 4 and the removal of the groove ring 502 from the check valve body 4.

[0031] By holding the groove ring 502 by hand, the groove ring 502 drives the check valve body 4 to move upward from the connecting pipe 1, so that the check valve body 4 is easy to take.

[0032] When the groove ring 502 needs to be removed from the check valve body 4, the groove ring 502 is held by hand and moved outward so that the block 501 on the inner side of the groove ring 502 moves from the groove 5, thereby facilitating the removal and installation of the groove ring 502.

[0033] During specific use, when the check valve body 4 needs to be quickly disassembled for inspection and replacement, the pull rod 304 is held by hand to drive the fixing plate 302 to move outward, so that the cross-shaped slider 301 set on the bottom of the fixing plate 302 can slide out from the cross-shaped slide groove 3. At the same time, the clamping plate 303 is also moved out from the fixing ring 401 on the bottom of the check valve body 4, thereby facilitating the disassembly of the check valve body 4 from the connecting pipe 1 for inspection and replacement, and the opposite operation can be performed to install it.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A check valve for a flue, comprising a connecting pipe (1), characterized in that: The top of the connecting pipe (1) is provided with grooves (2) around its periphery, the inner bottom of the groove (2) is provided with a cross-shaped slide (3), the interior of the cross-shaped slide (3) is slidably connected to a cross-shaped slider (301), the top of the cross-shaped slider (301) is fixedly connected to a fixed plate (302), and a clamping plate (303) is fixed to the inner side of the fixed plate (302) via a support. A check valve body (4) is provided at the top of the connecting pipe (1), and a fixing ring (401) is fixedly connected to the bottom of the check valve body (4) around the periphery. The clamping plate (303) is clamped to the inside of the fixing ring (401), and the shape of the clamping plate (303) is adapted to the inner cavity of the fixing ring (401). A valve flap (402) is movably connected to the center of the top of the check valve body (4).

2. A check valve for a flue according to claim 1, characterized in that: The connecting pipe (1) has two central ends at the bottom thereof, each of which is provided with a bayonet (101) for clamping the flue, and the bayonet (101) is located on the side wall of the inner cavity of the connecting pipe (1).

3. The check valve for a flue according to claim 1, characterized in that: A pull rod (304) for hand gripping is fixedly mounted on the outer side of the fixing plate (302).

4. The check valve for a flue according to claim 1, characterized in that: Grooved rings (502) for handholding are provided below both sides of the check valve body (4).

5. The check valve for a flue according to claim 4, characterized in that: The inner ends of the groove ring (502) are fixedly connected with clamping blocks (501), and the clamping blocks (501) are clamped in the clamping grooves (5) provided on the check valve body (4).

6. The check valve for a flue according to claim 5, characterized in that: The card block (501) is adapted to the card slot (5).

Images